Marine propeller



July 11, 1933. s. cRuMP 1,917,503

MARINE PROPELLER Filed Aug. 2, 1932 2 Sheets-Sheet l July 11, 1933. s. CRUMP MARINE PROPELLER Filed Aug. 2, 1 932 2 Sheets-Sheet 2 \M She man Cramp 51 Patented July 11, 1933 UNITED STATES PATENT oFFicE SHERMAN caviar; or HAYNESVILLE, LOUISIANA,

' MARiNE PROVBELLERY lApplic-ation filed August 2,1932. Serial No. 627,258.

An important object of the invention is to provide a propeller which will automatically swing to a position out of contact with obstructions in the water, such as large stones, logs or the like that lie in the path of travel of the vessel, thereby insuring against damage to the propeller.

Another object of the invention is to provide means for mounting the propeller for vertical adjustment, so that the propeller may operate at various depths.

Still another object of the invention is to rotation of the propeller with a comparatively slow operation of the operating crank and propeller shaft. 7

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the 55 scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawings:

Figure 1 is an elevational view of a propeller constructed in accordance with the invention.

Figure 2 is a vertical sectional view therethrough. t

Figure 3 is a sectional viewtaken on line 8-3 of Figure 2. r

Figure 4 is a plan View of the ring gear forming a part of the operating mechanism.

Figure 5 is an enlarged detail view lllustrating the adjustable connection between the propeller and vessel.

the reference character 6.

operation. provide gearing which will cause a rapid Referring to the drawings in detail, the

reference character designates a boat, to which the propelling device is attached, as by means of the bracket indicated generally by .The bracket comprises a ball section 7 and 5 a socketsection 8, the socket section being formed of a length of metal band material formed with sockets 9, the sockets being brought together to embrace the ball section, V

securing the sockets to the ball section.

A bolt 10 passes through the arms of the socket section of the bracket, securing the arms in position. The socket section is curved'so that when the bolt 10 is positioned, the socket section will be clamped around the tubular shaft housing 11 of the propeller.

Thus it will be seen that due to this conv struction, the shaft housing 11 together with the propeller shaft and propeller, to be hereinafter more fully described, may be adjusted vertically to regulate the depth of v At the lower end of the shaft 11, is a gear housing 12 in which the ring gear 13 operates, the ring gear being counter balanced by-the weights 14, to lend momentum 1701116 gear, and insure an even operation of the propeller.

The propeller is indicated by the reference character 16, and as shown is mounted on the outer end of the shaft that carries the pinion 18 meshing with the ringgear 13 with the result that when the ring gear is rotated, the propeller 16 will be rotated, and since the propeller operates at right angles to the ring gear, it will be seen that the thrust of the propeller 16 will act to force the boat, supporting the propeller, through the water. i

The ring gear 13 iscarried at the lower end of the propeller shaft 19, the upper end of the propeller shaft extending above the upper end of the tubular shaft housing 11, where it is supplied with a crank 20.

Suitable bearings indicated at 21 and 22 respectively, are mounted at the, ends of, the

tubular shaft housing 11, and support the shaft 19.

The reference character 22 designates the lever which is adjustably mounted on the tubular shaft housing 11 and so positioned that the occupant of the boat will have ready ac- 9 of the boat equipped with the propeller, operate the crank 20, to force the boat or vessel,

through the water.

By swinging the lever 22, the propeller may be shifted, to steer the boat.

Having thus described the invention, what is claimed is: r

1. The combination with the vertical, pivoted propeller shaft housing of a boat, of a propeller shaft, mounted within the housing, a combined fly wheel and ring gear mounted on the lower end of the shaft, normally holding the shaft in its vertical position, a pro: peller operated by the ring gear, and means for transmitting rotary movement to the pro peller shaft. Y

2. The combination with the Vertical, pivoted propeller shaft housing of a boat, of a propeller shaft mounted within the housing, a combined fly wheel and ring gear mounted within the housing, a bearing in which the housing is positioned, and said combined fly wheel and ring gear being disposed at a point below the bearing.

3. The combination with the vertical, pivoted propeller shaft housing of a boat, said housing including a lower gear housing, of a propeller shaft mounted within the propeller shaft housing, a combined fly wheel and ring gear secured to the lower end of the propeller shaft and operating within the gear housing, a propeller supported by the gear housing, means for transmitting movement ofthe ring gear to the propeller, and means fortransmitting movement to the-propeller shaft;

In testimony that I claim the foregoing as my own, I have hereto affixed my signature.

, SHERMAN GRUMP. 

